Java实例-输入年月日完成以下判断
完成以下要求
1：判断是否输入正确
2：判断输入的日期为星期几
3：判断输入的日期距离输入的第二个日期有多少天
4：判断输入日期的年龄
代码实现
package com.minrisoft;
import java.lang.String;
import java.util.Scanner;
public class Demo {
public static void calcWeek(int a,int b,int c){//判断星期几
int x = a,y = b,z = c;
if(b == 1){
b = 13;
a =a - 1;
}
if(b ==12){
b = 14;
a = a - 1;
}
int h = (int) ((c + (26 * (b + 1) / 10) + (a % 100) + ((a % 100) / 4) + ((a / 100) / 4) + 5 * (a / 100)) % 7);
switch (h) {
case 0:
System.out.println(x + "年" + y + "月" + z + "日:星期六");
break;
case 1:
System.out.println(x + "年" + y + "月" + z + "日:星期天");
break;
case 2:
System.out.println(x + "年" + y + "月" + z + "日:星期一");
break;
case 3:
System.out.println(x + "年" + y + "月" + z + "日:星期二");
break;
case 4:
System.out.println(x + "年" + y + "月" + z + "日:星期三");
break;
case 5:
System.out.println(x + "年" + y + "月" + z + "日:星期四");
break;
case 6:
System.out.println(x + "年" + y + "月" + z + "日:星期五");
break;
}
}
public static boolean leapYear(int y){//判断闰年
if (y % 400 == 0 || (y % 4 == 0 && y % 100 != 0))
return true;
else
return false;
}
public static int countDay(int y, int m, int d){//计算天数
int month_1[] ={ 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
int month_2[] ={ 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
int count = 0;
do {
count += 365;
if (leapYear(y) == true)
count += 1;
}while((--y)!= 0);
do{
if (leapYear(y) == true)
count += month_1[m-1];
else
count += month_2[m-1];
}while ((--m)!= 0);
count += d;
return count;
}
public static void Ture_or_False(int x,int y,int z){//判断输入的日期是否正确
if (y >= 1 && y <= 12 && z >= 1 && z <= 31){
if (y == 4 || y == 6 || y == 9 || y == 11){//当月份为4，6，9，11时
if (z > 30){
System.out.println("输入错误");
System.out.println(">-----------------------------<");
System.exit(0);
}
}
if (y == 2){//当月份为2时
if (leapYear(y) == true){
if (z > 29){
System.out.println("输入错误");
System.out.println(">-----------------------------<");
System.exit(0);
}
}
else{
if (z > 28){
System.out.println("输入错误");
System.out.println(">-----------------------------<");
System.exit(0);
}
}
}
}
else{
System.out.println("输入错误");
System.out.println(">-----------------------------<");
System.exit(0);
}
System.out.println(x + "年" + y + "月" + z + "日:输入正确");
}
public static void sumday(int y1,int y2,int x,int y,int z,int i,int j,int k){//判断输入的日期距离某天（输入的第二个日期）的天数
if (y1 == y2)
System.out.println(x + "年" + y + "月" + z + "日:处于今天");
if (y1 < y2)
System.out.println(x + "年" + y + "月" + z + "日距离"+i + "年" + j + "月" + k + "有" + (y2 - y1) + "天");
if (y1 > y2){
System.out.println(x + "年" + y + "月" + z + "日距离"+i + "年" + j + "月" + k + "有" + (y1 - y2) + "天");
}
}
public static void ages(int y1,int y2,int x,int y,int z){//判断年龄
if (y1 > y2){
System.out.println(x + "年" + y + "月" + z + "日:没有出生");
}
else{
int a = 2017 - x;
if (y > 4 || (x != 2017 && y == 4 && z > 10))
a -= 1;
System.out.println(x + "年" + y +"月" +z +"日:今年"+ a + "岁");
}
}
public static void main(String [] args){
Scanner sc = new Scanner(System.in);
System.out.print("请输入第一个日期（格式：yymmdd）:");
String y_m_d_1 = sc.nextLine();
System.out.println("请输入第二个日期（格式：yymmdd）");
System.out.print("注意：保证在第一次输入的日期之后:");
String y_m_d_2 = sc.nextLine();
sc.close();
//String 转 int
int x =Integer.parseInt(y_m_d_1.substring(0,4));//截取年
int y =Integer.parseInt(y_m_d_1.substring(4,6));//截取月
int z =Integer.parseInt(y_m_d_1.substring(6,8));//截取日
int a =Integer.parseInt(y_m_d_2.substring(0,4));//截取年
int b =Integer.parseInt(y_m_d_2.substring(4,6));//截取月
int c =Integer.parseInt(y_m_d_2.substring(6,8));//截取日
int year_1 = countDay(x,y,z);
int year_2 = countDay(a,b,c);
System.out.println(">------------查询结果----------<");
Ture_or_False(x,y,z);
calcWeek(x,y,z);
sumday(year_1,year_2,x,y,z,a,b,c);
ages(year_1,year_2,x,y,z);
System.out.println("|------------------------------|");
}
}